Valve.



I E. DAVIDSON.

VALVE.

APPLICATION FILED JULY 23, 1910.

PatentedDec. 13, 1910.

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7' INVENTUR Jen/Ina- 1?. flfiqam v ATTORNEYS J. E. DAVIDSON.

VALVE.

APPLICATION FILED JULY 23. 1910.

978,706. Patented Dec.13,1910.

2 SHEETS-531E312.

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- Yam ATTORNEYS UNITED STATES PigllENT OFFICE.

JAMES E. D AVIDSON, OF BUTTE, MONTANA VALVE.

To all whom it may concern:

Be it known that I, JAMES E. DAVIDSON, a citizen of the United States,and a resident of Butte, in the county of Silverbow and State ofMontana, have invented certain new and useful Improvements in Valves, of

hereof-Figure 1 is a plan view of the im-' provement, Fig. 2 is a sideview, Fig. 3 is a similar view at right angles to Fi 2, and Fig. 4 is adetail side view or the link. 1

In the present embodiment of the invention, the valve casing 1 isprovided with a rotary valve 2, whose stem 3 extends through a packingnut 4 in the casing wall, and has secured thereto a ratchet wheel 5. Thestem 3 is journaled at one end in a bearing 6 in the casing and at theother in a nipple 7 onto which is threaded the packing nut .4. i

A plate 8 is secured to a face of the hexagonal flanges 9 at'the ends ofthe casing, b means of cap screws 10, and spacing b ocks 11 areinterposed between the' plate and the flanges, as shown in Fi 2. Theplate extends above the stem 3, o the valve, and at one corner of theplate adjacent to the ratchet wheel 5 asolenoid coil 12 is secured tothe plate.

Th core 13 of the coil is slidable longitudina ly of the coil, andextends below the plate, the lower end of the core being transverselyslotted to form a pair of ears 14. A sleeve 15 is threaded into thecasing of the solenoid coil at its upper end, and the reduced upper end16 o the core passes upwardly through the sleeve.

The extremity of the reduced portion of the core is threaded as shown at17 and nuts 18 and 19 are threaded onto the said extremity, thelowermost nut 1.9 resting on the upper end ofthe sleeve. The arms 20 ofa Specification of Letters Patent. I Patented Dem-13, 1910. Applicationfiled July 23, 1910. Serial No. 573,395. i

the lin is extended and engages the yoke 21 so that the yoke moves withthe link. The

yoke 21 and the link form the pawl carrier which is journaled on thestem.

A holding pawl 25 is pivoted to a bracket 26 depending from the plate,and engages the ratchet wheel to prevent reverse movement thereof. A pin27 is arranged above the pawl 23 to prevent displacement thereof. Thepin limits the upward movement of the pawl, so that the pawl. cannotswing over and out of engagement with the wheel.

A pair of binding posts 28 and 29 are arranged on the plate' and leadwires 30 and I 31 lead from the respective posts to the coil of thesolenoid. Below the plate the posts are provided with the usualperforations for receiving the circuit wires, and .with set screws 32for holding the wires in place.

It will be noticed, from an inspection of Fig. 3, that the bracket 26 isextended below the pawl 25 as at 33, and thatthe end'thereof is'beveledat 3 1 for engagement by the upperedge of the pawl 23. The'movement ofthe pawl is limited by its engagement with the beveled surface to limitthe movement of the ratchet wheel and consequently of the valve.

The ratchet teeth are preferably very fine, in order that the engagementof the pawl may take place at an early point in its movement, that is tolimit the lost motion as closely as. possible. It will be understoodthat any suitable mecha-nism'may be made use of to control the currentto the solenoid.

The operation is as follows: When the current is admitted to the coil ofthe solenoid, the core is drawn upwardly and the link-is lifted. Thepawl 23. engages. the ratchet wheel turning the same, and partiallyrotating the stem, to partially open the valve. As soon as the currentis shut Q g I ofi' the weight of the yoke pulls the core down, thedownward movement being limited by the engagement of thenut 19 with theend of the sleeve.

By turning the nuts the extent of the downward movement may be varied.The movement of the stem is repeated until a sufiicient amount offluidis passing through the valve. I When the pro er amount is passingthe valve may be 1e t with the certainty that no more and no less willflow through the valve until it is changed. 7 To close the valve thestem is rotated until the fluid is shut ofii', and a suitable indicatingmechanism may be used if desired. In practice the crating mechanism maybe oxed up in a c osed receptacle and operated from a distance ifnecessary.

A shoulder 35 is'formed between the main portion of the core and thereduced portion and the shoulder is adapted to engage the movement, aracket depending from the plate, a holdin pawl pivoted to the bracketyoke havingits arins journaled on the stem,

one on' each side of the ratchet wheel, a

link connecting the yoke with the lower end of the core, a driving pawlpivoted to the link and engaging the ratchet wheel, a pin above the awlfor limiting its upward and engaging t e ratchet wheel, the bracketdependmgbelow the holding pawl into position for en gement by thedriving pawl near the on of its upwardmovement, the

- upper end of the core being reduced and .45lthreaded andextendingeabove the core, a tween the reduced shoulder bein formedportion and t emain portion, a nut threaded onto the reduced portion forlimiting the downward vmovement of the, core, and a sleeve connectedwith the coil through which the .core extends for engagement by theshoulder to limit theupward movement of the core.

2. The combination witha valve casing,

and a valve rotatable therein'of a stem for the valve extending-throughthe casing, a

' 1 I ratchet wheel secured to the stem, a plate fsecuredt'o-the casingand extending above the stein,' a solenoid coil on the plate, the reofthe coil extending below the plate, a having its; arms jdurnaled onthe I stem,

adr v fig wl pivoted to thelink th fiyok -with"- the lower end of gandengaging the ratchet wheel, a pin above the pawl for limiting itsupward movement,

a bracket depending from the plate, a holding pawl pivoted to thebracket and engaging the ratchet wheel, the bracket depending below theholding pawl into position for engagement by the driving pawl near theend of its upward movement, and means for limiting the movement of thecore with respect to the coil.

3. The combination with a valve casing, and a valve rotatable therein ofa stem for the valve extending throu h the casing, a ratchet wheelsecured to t e stem, a plate secured to the casing and extending abovethe stem, a solenoid coil on the plate, the core of the coil extendingbelowthe plate, a yoke having its arms journaled on the stem, one oneach side of the ratchet wheel, a link connecting the yoke with thelower end of the core, a driving pawl pivoted to the link and engagingthe ratchet wheel, a pin above 7.

the pawl for limiting its upward movement, a bracket depending from theplate, and a holding pawl pivoted to the bracket and engaging theratchet wheel, the bracket depending below the holding pawl intoposition for 'enga ement by the driving pawl near the end 0? its upwardmovement.

. 4.. The combination with a valve casing,

and a valve rotatable therein of a stem for the valve extending throughthe casing, a

ratchet wheel secured to the stem, a platesecured to the casing andextending above the stem, a solenoid coil on the plate, the

coi'e of the coil extending below the plate, a yoke. having its armsjournaled on the stem, oneon each side of the ratchet wheel, a linkconnecting the yoke with the lower end of the core, a driving pawlpivoted to the link and 'engaging'the ratchet wheel, a pin above thepawl for limiting its upward movement,

, a holding awl for preventing reverse movement of e ratchet wheel, andmeans for limiting the movement of the core.

5. The combination with a valvev casing, and a valve rotatable thereinof a stem for the valve extending through the casin a ratchetwheelsecured to t e stem, a p ate secured to the casing and extendingabove the stem, a solenoid coil on the plate, the core of the coilextending below the plate, a yoke having its arms journaled on the stem,one on each side of the ratchet wheel, a link connectingthe yoke withthe lower end of the core, a driving pawl'pivoted to the link andengaging the ratchet wheel, a pin above the pawl for limiting its upwardmovement, and a holding pawl for preventing reverse movement of theratchet wheel.

6. The combinationwith a valve casing, and a valve rotatable therein ofa stem for the valve extending through the casin asecured to the casingand extending above end engaging the ratchet wheel, 'and a hold-- thestem, a solenoid coil on the plate, thev mg pawl'for preventing reversemovement core of the coil extending below the plate, a of the ratchetwheel. Y yoke having its arms journaled on the stem, 4 JAMES E.DAVIDSON. 5 one on each side of the ratchet wheel, a link Witness%:connecting the yoke with the lower end of CLIFFORD C. GREEN, the core, adriving pawl pivoted to the link CYimNUs H. SMITH.

